Typewriting machine



G. W. CAMPBELL. TYPEWRI'HNG MACHINE. APPLICATION FILED JUNE l5. 19m:

Patented Feb. 28, 1922.

5 SHhTS-SHEET 1.

Minessef G. W. CAMPBELL.

TYPEWRITING MACHINE.

"memo" FRED umz f5, 1919.

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VV/fnesse3 G. W. CAMPBELL.

TYPEWRITING MACHINE.

APPLICATION FILED)UNE15.IU18.

1 ,407, 982 Patented Feb. 28, 1922.

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TYFEWRITING MACHENE.

APPUCATIUN FILED JUNE 15. I918.

Patented Feb. 28, 1922.

5 SHkETS-SHEET 4.

\ Affarfiey G W. CAMPBELL. TYPEWRIHNG MACHINE. APPLICATIONFILKDJUNEIS,19I8.

Patented Feb. 28, 1922.

5 SHKEYS-SHEET 5- uniiso STATES PATENT. OFFlCE.

TYPEWBITER COMPANY, OF NEW YORK. N. Y..

A CORPORATION OF DELAWARE.

TYPEWRITING MACHINE.

Application filed June 15.

T 0 all who-mii may concern:

Be it known that l. Gnonon V. (nurnnm a citizen of the llnited States. residing in Hartford, in the county of Hartford and State of Connecticut. have invented certain new and useful Improvements in Typewriting Machines. of which the following is a specification.

This invention relates locking mechanism for chines.

Anobject, of my invention is to provide for compactness. lightness, low coSt and ease of production. which are particularly desirable in machines of the small. portable generally to linetypewriting ma- I )rovide a lightly constructed slidable niem er mounted on the case-shift frame of the machine and operable when the typewriter carriage reaches the end of a line. said member co-operating with a locking bar to lock the keys. Simplicity of construction. lightness, and a minimum number of parts are sought.

Another feature of my invention is that the signal. usually provided on typewriting machines for notifying the operative when the carriage is about to reach the end of a line. is mounted directly upon the marginal sto \R ith niy construction, many of the parts which heretofore have formed the connection between marginal stops and signaling devices. are eliminated.and thus lightness. simplicitv and'low cost of manufacture are obtaine Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure l is a sectional side view; of a typewriting machine. showing my invention applied thereto.

Figure 2 is a sectional top plan view of the machine shown in Figure 1. parts being omitted and broken away to show the underlying structure. 7

F gure 3 is a rear view of the machine. showing the left marginal stops carrying the signaling device and means for operating said device.

Figure 4 is a ing the right marginal stop as seen front.

Figure fractional front view. showfrom the a is a detail fractional view. show Specification of Letters Patent.

Patented Feb. 28, 1922.

mm. Serial no. 240,146.

ing a type key and means for locking said key at the end of a line.

Figure 6 is a sectional view through the left marginal stop. showing the structure.

Figure 7 is a diagrammatic rear view, showing the position of the parts just before the signal is to he operated.

Figure 8 is a view similar to Figure 7, showing the position of the parts when the signal is operated.

Figure 9 is a view similar to Figure 7, showing the position of the parts when the carr age is arrested at the end of its travel.

Figure 10 is a view similar to Figure 7. showing the position of the parts when the carriage is moved beyond the left marginal stop.

Figure 11 is a fractional. isometric, perspective view. showing the mechanism for locking the keys when the carriage reaches the end of its travel.

Type keys 15 (Figure l) actuate hellcranks 16. which. through links 1?. swing type-bars 18 upwardly and rearwardly against a platen l9 mounted on a carriage '20. which travels in letter-feeding direction at the actuation of said keys. the latter actuating a universal bar 21 at each key stroke to actuate an escapement mechanism indicated in general at 22. which controls the carriage 20 in its letterfeeding movements. The carriage is mounted to travel on a case-shift frame 23 shiftable at the depression of shift he s 24.

0 arrest the carriage 20. there is provided a left marginal stop 30 (Figures 2. 3. and 6 to 10. inclusive) adjustable at letter-space intervals on a rack 31 slidahly mounted at the rear of the shift frame and prov ded with a projection 3:: against which the end of a lever 33 fulcrunied on the rear bar of the typewriter carriage at 34 abuts when said carriage reaches the end of its travel. said rack mounted lever.

T o lock the ty e keys 15 at the end of the carriage travel, t e bar 31. on which the marinal stop 30 is mounted. is connected with a slidahle link 35 (Figures 1. 2. 3. and ill to form a sliding frame. which. through the iiitermediary of connections presently to he de scribed. automatically locks the keys 15 against depression until the locking mechanism is manually released.

in proximity to said i For this purpose. the bar or rack 31 has slots 36 (Figures 3. 4 and 7 to 11. inclusive) formed at either end. through which pass screws 37 at the ends of brackets 38 fast to the shift frame 23.

'hen the lever 33 on the carriage strikes the projection 32 on the left marginal stop Ill). further letter-feed movements of the carriage will slide said bar 31 leftwardly and therewith the slidable link 35 (Figure 9). so that a downwafilly-extending arm -13 thereon will rock a. bell-crank 39 pivoted at to to the stationary machine frame. to swing an arm 41 (Figures 2 and 11) of said bellcrank underneath the universal bar 21 (Figui'c .3) in control of the eseapement mechanism 2;. so as to prevent the depression of said bar and thereby prevent depression of any type key. and also locking the carriage 2o against letter-spacing or letter-feeding movements. The stop-carryin slidablc member or bar 31 and the slida )le link 35 therefore form both a'carriage-locking de vice and an operating device for the keylocking member or bell-crank lever 35 The arm 4-15 is of suflicient length to accommodate the lt]iitltltlfl\\'ti movements oi the case shift frame.

To prevent bending the bell-crank arm 41. due to its lightness. at the depression of a type key 15. the effective end of said arm moves in a slot -42 (l igures and 11) formed in a bracket 44 and is supported thereby.

The shift fram 23 at the rearthereof includes a vertical plate having the-rein an opening 45 through which the slide 35 extends into a position for its arm 43 to operate the key-locking device or bell-crank lever 39. The slide 3.? is guided upon this rear vertical plate of the shift frame 23 by means of a screw ltj'passing through a slot 46 in the slide 255. as shown in Figures 1. 2 and 3.

To notify the operative when the carriage Q 1 and type keys are about to be locked at the end of a line. a signal in the form of a bell in. is provided.

For lightness and simplicity of structure. the bell 48 (Figures 1. 2. 3 and (5 to 10. in clusivc) is directly attached to the left marginal stop 30 by a bracket 4!) and is struck by a bell-ciapper 50 mounted on the end of a wire spring 51 fast to the lever 33 near its fulcrum 34 (Figure '3). To actuate the bellrlappcr. the marginal stop tilt is provided with a one-way cam 5:! (Figures 1. 2. 3 and (3 to ltl. inclusive) placed so as to raise the. lever 33. as in Figure T. against the pressure of a spring 4? (Figures 3 and 9) when the carriage 2H travels in letter-fccding direction. and to abruptly drop said lever. as in "ig'urc so that the bell-clapper 50 will strike the bell 4H and rebound. thereby leaving saiil bell tree to vibrate.

lo permit the return of the typewriter carriage after sounding the bell 48. the cam 52 is swingably mounted on a stud 53 (Figures I. 2. 3 and (3) fast to the left marginal stop 30. and is held by a spring 54 against a pin 55 also fast on said stop. to holdthe cam when the cndof the lever 33 is moving there' over in letter-feeding direction. \Vhcn the carriage 20 and lever 33 are moved in antiletter-leeding direction. the end of the lever will engage the back of the cam 52 and swing said cam about the stud 53 and against the tension of the spring 54. When the end of the lever 33 passes said cam. the latter will be returned to it normal position by said spring.

To unlock the keys l5 and the carriage 20 when arrested by the left marginal stop 30 so that typing may be performed beyond the end of the line. as determined by this margiual stop. the lever 33. which is mounted at the rear of the carriage. is provided with a key (it). (Figures 1. 2. 3 and 9). which. when depressed. raises the left end of the lever above the projection 32 of the left marginal stop. seen in Figure 11 This permits a spring (51 (Figures 2, 3. 9 and 11) anchored to the shift fram :23 and attached to the sliding link 35 to retract the latter and there with the bar 31. so as to move said projection out of engaging relation with the lever 3-; and to permit a spring (32 (Figures 1. :2 and 11) to return the bcll t'rank 39 to its ineffective position. thus unlocking the type keys and the carriage.

At the completion of a line of writing. the carriage 20 may be returned to the beginning of a'ncw line. and is arrested in its movement by the left end of the lever 33 engaging a right marginal stop (35 (Figures 1. 2. 3. 4 and 9) also adjustable at letter-space. intervals on the slidable bar 31 at the rear of of the shift frame. \Yhcn the carriage is thus returned. the bar 31 and link 35 connccted therewith are returned by their spring 61 to normal position. and the arm 41 of the bell-crank 39 is returned to its normal ineffective position by its spring 62 from underneath the universal bar 21. thereby unlocking the type keys.

To adjust the marginal stops 30 and (35 along the bar 31. each stop is provided with a finger-piece 66 integrally formed with a C-shaped transversely movable dog member or slide (37. which has integrally formed thereon. a pawl or dog (38 (Figure 7'). which normally engages teeth 69. formed on the bar 3]. When the linger-piece 66 is depressed against the power of a spring 70. the slide is moved downwardly to disengage the pawl 6H from the teeth of the bar 31. to permit the marginal stops to be moved along Said bar to any desired position. The slides (ii' are guided on the marginal stops by guides 71. integrally formed with the marginal stops. It will be noted that the marginal stops may be moved inwardly, or towards each other, without depressing the. fingeriece 136. the pawl 68 snapping over the teeth on of the bar 31. but the spring To is strong enough to hold said stops against accidental displacement inwardly. The marginal stops are, however. positively held from being moved outwardly by the pawl 68 abutting against one of the teeth 69.

The marginal stops 30, and their slides (37 are preferably formed of sheet-metal and thereby simplicity and economy are attained.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine, the combination with type-keys and a traveling carriage, of marginal stops for arresting said carriage at the beginning and at the end of a line, a case-shift frame on which said carriage travels to be shifted thereby, a slidable member on said shift frame to shift therewith and on which said marginal stops are mounted, and a device mounted upon the frame of the machine for locking said keys at the end of said line, said key-locking device being operable by said slidable member for locking said keys in any case-position of said shift. frame.

2. In a typewriting machine. the combination with type keys, of a traveling carriage, a marginal stop for arresting said carriage at the end of its travel, a case-shift frame on which. said carriage travels, a slidable member for said marginal stop mounted on said case-shift frame, a universal bar underlying said keys and actuable at the depression of said keys, and a lever mounted on the framework of the machine and operable by said slidable member at any position of said case-shift frame and co-operating with said universal bar for locking said keys at the end of the carriage travel in any posi tion of said carriage.

3. In a tvpewriting machine of the class described, the combination of a case-shift frame. a carriage frame on said shift frame and having a platen and comprising a rear bar behind the platen. a lever .pivoted upon said rear bar and extending thercalong and provided with a key. a rack mounted upon said shift frame in proximity to said lever, and margin-controlling devices independently adjustable along said rack and each having means cngagcable by said lever to lock the carriage so as to control the extent of margin, said levcr operable to disengage said means for unlocking the carriage.

4. In a typewriting machine of the class described, the combination of a case-shift frame. a carriage frame on said shift frame and having a platcn and comprising a rear bar behind the platen, a lever pivoted upon said rear bar and extending therealong and provided with a key. a rack mounted upon said shift frame in proximity to said lever, and margin-controlling devices independently adjustable along said rack and each havin means engageable by said lever to lock t e carriage so as to control the extent of margin. said lever operable to disengage said means for unlocking the carriage. one of said margin-controlling devices carrying a bell arranged between said rack and said shift frame.

5. In a typewriting machine of the class described. the combination of a case'shift frame, a carriage frame on said shift frame and having a platen and comprising a rear bar behind the platen. a lever pivoted upon said rear bar and extending therealong and provided with a key, a rack mounted upon said shift frame in proximity to said lever, inarginwontrolling devices independently adjustable along said rack and each having means engagcablc by said lever to lock the carriage so as to control the extent of margin. said lever o )erable to disengage said means for unloclv'ing the carriage. said rack movable endwisc by said carriage and lever. a slide attached to said rack and extending downwardly, means upon said shift frame to uide said slide. said slide having a downwardly projecting arm, and a keydocking lever in the path of said arm; said arm being of sufficient length to accommodate the shifting movement of said shift frame.

(3. The combination of a carriage. a shift frame together with which the carriage is shiftable up and down to different case positions. a rack, a margin-controlling device upon said rack. said rack movable endwise by said carriage, a slide attached to said rack and extending downwardly, means upon said shift frame to guide said slide, said slide having a downwardly projecting arm. a her-locking lever in the path of said arm: said arm being of sufficient length to accommmlatc the shifting movement of said shift frame. and a spring connected to said slide to retain it to normal position together with said rack. w

7. in a typewriting machine of the class described. the combination of a case-shift frame, a carriage frame on said shift frame and having a platcni a rack mounted upon said shift frame. a lever on said carriage frame. margin-controlling devices independently adjustable alon said rack and eagh having means engageable by said lever to control the extent of margin. said rack movable endwise by said carriage and lever. a slide attached to said rack and extending downwardly. means upon said shift frame to guide said slide. said slide having a downwardly projecting arm. and a kc \'-locl ing lever in the path of said arm: said arm being of suflicientlength to accommodate the shifting movement of said shift frame; said shift frame comprising a vertical plate and having an opening through which said slide extends to position to operate said key-looking lever.

8. The combination of a carriage. a shift frame together with which the carriage is shiftable up and down to different case position a rack. a margin-control]ing device upon said rack. a lever on said carriage. said rack movable endwise by said carriage and lever. a slide attached to said rack and extending downwardly. means upon said shift frame to guide said slide. said slide having a downwardly projecting arm. and a keylocking lever in the path of said arm; said arm being of sufficient length to accommodate the shifting movement of said shift frame.

9. The combination of a case-shift frame, a carriage thereon. a margin gage to cooperate with said carriage, a. slide controlled by said margin age. an arm con nected to said slide, and a key-locking mechanism mounted on the framework of the machine and including a part in the path of said arm. whereby the actuation of the slide by the carriage operates through said arm.

to lock the keys; said arm being lengthened to accommmlate the case-shifting movements of said frame.

It). The combination of a frame mounted to shift up and down. a carriage mounted to travel on said frame. a margin-gage device to co-operate with said carriage, an arm actuable by said margin-gage device. and a kc v-locking mechanism mounted on the stationary framework of the machine and in eluding a part in ,the path of said arm, whereby the actuation of the margin-gage device by the carriage operates through said arm to lock the keys: said arm being lengthened to accommodate the case-shifting movements of said frame.

11. The combination of a frame shiftable to different case positions. a carriage traveling on said frame, a letter-spacing universal bar operable by the type keys. a normally ineffective lock for said universal bar. said lock and said universal bar mounted upon the stationary framework of the machine. and an arm carried by said shift frame to engage said lock. and operable by said carriage to move said lock to effective position, said arm lengthened to accommodate the caseshifting movement of said frame.

1:3. The combination of a frame shiftable to different case positions, a carriage traveling on said frame, a margin-gage rack movable l) said carriage, a letter-spacing univcrsal bar operable by the type keys, at normally ineffective lock for said universal bar, said lock and said universal bar mounted on the stationary framework of the machine,

and an arm moving with said shiftable frame and connected to said rack to engage said lock to move it to effective position. said arm lengthened to accommodate the case-shifting movements of said frame.

13. In a typewriting machine having typekeys, the combination of a case-shift frame. a carriage mounted to travel on said frame, a slide mounted for endwise movement on the case-shift frame. a margin-gage on the slide to co-operate with the carriage. an operating member connected with said slide to move therewith. and a key-locking mechanism mounted on the framework of the machine and including a part in the path of said member, whereby the actuation of the slide by the carriage operates through said member to lock the typo-keys, said member having a sliding engagement with said part to accommodate the caseshifting movements of said frame.

14. In a front-strike ty 'iewriting machine having type-keys. the combination of a caseshift frame mounted to shift up and down. a carriage mounted to travel on said frame. a margin-gage device to compel-ate with the carriage. an operating member on the caseshift frame operable b said margin-gage device, and a key-locking mechanism mount ed on the stationary framework of the machine and including a part in the path of said operating member, whereby the actuation of the margin-gage device by the carriage operates through said operating member to lock the type-keys, said operating member having vertical sliding relationship with said part to accommodate the caseshifting movements of said frame.

1:). In a typewriting machine having type-keys. the combination of a frame shiftable to different case-positions, a carriage traveling on said frame. a letter-spacing universal bar operable by the type-keys, a n0!- maliy ineffective look for said universal bar, said lock and said universal bar being mounted upon the stationary framework of the machine, and an operating member carried by said shift frame and operable by the carriage to move said lock to effective position, said operating member having operating connection with said lock to accommodate the case-shifting movements of said frame.

16. In a typewriting machine having ty )ekeys. the combination of a frame shifta le to different case-positions. a carriage traveling on said frame. a margin-gage member mounted on the shift frame to be moved by the carriage. a letter-spacing universal bar operable by th t vpc-keys. a normally ineffective lock for said universal bar. said lock and said universal bar being mounted a on the stationary framework of the machine, and an operating member moving with said shiftable frame and operable by said margingage member to move said lock to effect-ire position. said operating member having op erating connection with said look to accommodate the case-shifting movements of said frame.

IT. in u front-strike typewriting machine having type-keys. shift frame mounted to .ehit't up and down. a carriage mounted to have letter-spacing travel on said frame. a letter-sparing uni versal bar mounted upon the stationary i'ranu-imrk-ot tlie nuu'lnnen normal-iv ineffertive key-locking member pivoted 'upon a vertical axis on the statiolmry framework of the machine and movable into locking engagement with the universal bar to prevent letter-spacing actuation thereof, and an operating device carried bythe shift frame to be operated by the carriage in its letterspacing movement and having a vertical sliding engagement with said keydocking member soas to operate saidkey-locking member in all case-positions of therarriage and its shift frame. v

18. In a front-strike ty iewriting machine having type-keys. the com iinat-ion of a caseshift frame mounted to shift up and down, a rarriuge mounted to travel on said frame. a letter-sparing; universal har mounted upon the stationar framework of the machine. a normally ine fective key-lorking bell-crank lever pivoted upon a vertical axis on the. stationary framework of the murhine and having a laterallyex'tendinp hut-king arm movable into looking engagementwith the universal bar to prevent letter-sparing actuation thereof and having a rearwarally-extending actuating: arm. and an operating device carried by the shift frame to he operated by the carriage in its letter-spaeing movement and having a vertiral sliding engagement with the actuating arm of said key-locking bell-crank lever so as to operate said key-looking hell-crank lever in all rase-positions of the marriage and its shift frame.

19. In a front-strike 1y having type-keys, the rom iination of a caseshift frame mounted to shift up and down, a rarriage mounted to have letter-sparing travel on said frame. a stopwarrying bar movably mounted on the case-shift frame. a margin-stop adjustable along said har and engageahle by the (-arring'r in its letter-spacin; movement to move said liar. a lettersparing universal llfll mounted upon the stationary framework of the machine. normally inelfei-tive key-lurking hell-rrunk lever pivoted upon a vertiral axis on the stationary framework .of the m'iu-hiur and having a laterallv-evteiuling locking arm movahle into looking: engagementu'ilh the uni ver nl har to prevent li-tter-spzu-illg urtua- (ion {hereof and having: a rearwnrdly-extending actuating arm, and an operating the romhiuation off a case'- linve letter-spacingewriting! machine member connected to said stop-carrying bar to be mored thereby and having a vertical slltllllg enga ment with the actuating arm of said key-Efcking bellcrank lever so as to operate said key-lockin bell-crank lever in all case-positions of the carriage and its shift frame.

20. In a frontstrike ty ewriting machine having; type-keys, the com ination of a caseshift frame mounted to shift upand down, a irarrnige mounted to have letter-spacing travel on said frame. a stop-carrying slide mounted to have endwise movement laterally on the ease-shift frame, margin-stops independently adjustable along said slide, a manually-operable memher movably mounted on the carriage and normally engageable with said stops hut releasable therefrom. said slide being slidable by the engagement of said member with one of said stops. a letterspaeing universal bar mounted upon the stationary framework of the machine. a normally ineffective key-locking bell-crank lever pivoted upon. a vertical axis on the stationar framework of the machine and havin a laterally-extending locking arm movable into locking engagement with the universal bar to prevent letter-spacing actuation thereof and having a rearwnrdly-extending artuating' arm, and an operating arm i'unnoitorl to and extending O V1'l'l1l(ll from said slide and having a vertical slidiiue engagement with the artuatinp arm of said heyloi-king hell-crank lever so as to operate said key-looking hell-crank lever in all ease-posit-ions of the carriage and its shift frame.

it. [u a front-strike typewriting machine having type-hers, the romhination of a caseshift frame mounted to shift up and down. u carriage mount-ed to have letter-sparing travel on said frame. a letter-sparing universal har mounted upon the stationary framework or the iuarhine. a normally inuted upon a vertiral axis on the stationary framework of the machine and having a latterlyrxtending locking arm movable into lurking engagement with the universal bar to prevent letter-spacing actuation thereof and having a rearwardly-extendingz actuating arin. an operating member carried by the. shift frame to he operated by the rarringe in it s h-tter-swu-iug movement and having a veriiral sliding engagement with the artuating arm of said Lev-looking hell-crank lever so as to perate said key-locking hell-crank lever in all ruse-positions of the rarriage an its shift frame. and a support for the free end of the lOClClH}! arm of said key-locking iu-ll-rrnnk lever to prevent the. downward yielding of said lockiu :irni lvv pressure of th universal har.

J2. ln :1 front-Strike typomitinu marhine having tvpwkuvs. the roniliinalion of a rustshilt [radio mounted to shift up and down,

a carriage mounted to have letter-spacing travel on said frame, a stop'earrying har movably mounted on the case-shitt frame, a margin-stop adjustable along said bar and engageable by the carriage in its letter-spacing movemrnt to move said bar, a letterspacing universal bar mounted upon the stationary framework of the machine, :1 normally inefl'ertive key-locking bell-crank lever pivoted upon a vertieaL'axis of the stationary framework of the machine and having'a Laterally-extending lockingarm movahle into lot-king engagement with the uni- \Pl'sul bar to prevent letter-spacing artualion thereof and having a rearwardly-extending artuatin arm. an operating memher rminevted to said stop-earr \'in, 1 bar to he moved thereby and having avertical sliding euga ement with the actuating arm of said keym-king hell-crank lever so as to operate said her-locking hell-crank lever in all vase-positions of the carriage and its shift frame. and a support for the free end of [he lurking arm of Said lreydoeking bell- ('I'Rllh' lever to prevent the downward yield in; of said locking arm by pressure of the universal bar.

23. In a front-strike typewriting machine having,' type-keys, the eombination of a caseshilt. frame mounted to shift up and down, a carriage mounted to have letter-spacing travel on said frame, a stop-carryingvslide mounted to have endwise movement laterally mi the ease-shift frame. margin-stops independently ar ljustahlealong said slide, a mannaILv-o-perahle member moi-ably mounted on the carriage? and normally engageable with said stops hut releasable therefrom,

I a1d slide being slidahhby the engagement ni said member with one of said stops, at letter-sparing universal bar mounted upon.

lug eugagvnu-ul' with the artuatinp: arm of,

said ke vdm'kiug hell-c-rauk lever so as to operate a-aid liQY-hkking hell-crank lever in all easwpusilinus of the varriage and its shil'td'rauw. and a suppor! for the free. end of the lug-king arm of aaid Rev-lurking bellrranlt h-ver to prevent the downward yielding; of said lurking arm by pressure of the universal har.

GEORGE W. CAMPBELL. \l'i messes.

W. A. Benson, M. bl. EAKIN. 

